The network of glands that release chemical messengers directly into the bloodstream is called the ________.

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The network of glands that release chemical messengers directly into the bloodstream is called the endocrine system. The endocrine system produces and secretes these chemical messengers, referred as hormones directly into bloodstream to transmit signals to appropriate part of body. The hormones regulate bodily functions like growth, metabolism, tissue function, sexual function, reproduction, sleep and mood.

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A simple _____ telescope uses two convex lenses to gather and focus light.

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A simple refracting telescope uses two convex lenses to gather and focus light from a distant object.

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In the traditional phylogeny (A), the phylum Platyhelminthes is depicted as a sister taxon to the rest of the protostome phyla,

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In the traditional phylogeny platyhelminthes is depicted as a lophotrochozoan phylum. What probably led to this change?

The removal of the acoel flatworms (Acoela) from the Platyhelminthes allowed the remaining flatworms to be clearly tied to the Lophotrochozoa.

Explanation: